EP0368064A2 - Clamping device for moulds with clamping bolts protruding from lateral clamping surfaces - Google Patents

Clamping device for moulds with clamping bolts protruding from lateral clamping surfaces Download PDF

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Publication number
EP0368064A2
EP0368064A2 EP89119561A EP89119561A EP0368064A2 EP 0368064 A2 EP0368064 A2 EP 0368064A2 EP 89119561 A EP89119561 A EP 89119561A EP 89119561 A EP89119561 A EP 89119561A EP 0368064 A2 EP0368064 A2 EP 0368064A2
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EP
European Patent Office
Prior art keywords
clamping
end positions
bores
locking
locking rods
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Granted
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EP89119561A
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German (de)
French (fr)
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EP0368064A3 (en
EP0368064B1 (en
Inventor
Alois Wörner
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Individual
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Individual
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Priority to AT89119561T priority Critical patent/ATE86914T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1742—Mounting of moulds; Mould supports
    • B29C45/1743—Mounting of moulds; Mould supports using mounting means projecting from the back side of the mould or from the front side of the mould support

Definitions

  • the invention relates to a clamping device for tools with lateral clamping surfaces projecting and in the vicinity of their free ends transverse recesses having clamping bolts, with a receiving holes for the tool clamping bolts and these mounting bores having right-angled bearing bores quick release plate and with locking rods rotatably and axially displaceably received in the bearing bores with locking rods engaging in the coupling recesses in the transverse recesses of the tool clamping bolts and clamped with these clamping eccentrics.
  • a known clamping device of this type which is described in DE-OS 34 44 800, is used for clamping injection molds with two mold halves, over whose lateral clamping surfaces protrude clamping bolts which have transverse recesses in the form of a U open on one side near their ends facing away from the clamping surfaces -shaped Have transverse grooves.
  • This tensioning device comprises two quick-action clamping plates fastened to the vertically extending mounting plates of an injection molding machine when used as intended, with mounting holes for the clamping bolts of the mold halves extending at right angles to their surface extensions and with bearing bores which each extend in the plane of the quick-action clamping plates and the mounting holes for the tool clamping bolts Cut off-center, axially movable and rotatable locking rods.
  • the known tensioning device has proven itself, but appears to be in need of improvement in terms of its handling.
  • the improvement according to the invention is characterized in that between the locking rods and the quick-action clamping plate each accommodating them in bearing bores, form-fittingly interacting means for limiting the axial mobility of the locking rods between two axial end positions and for securing against rotation in the displacement range between these end positions are provided.
  • the invention is that the one corresponding to the coupling positions with a tool clamping pin one end position and the other end position withdrawn are fixed by the mentioned securing means and in the displacement range between these end positions rotation of the locking rods is prevented. There is therefore a clear fixation of the two end positions of the locking rods and an anti-rotation device in the area in between.
  • the means for limiting the axial displaceability of the locking rods between the two end positions mentioned and for securing against rotation in the displacement area between these end positions comprise a longitudinal groove and a locking pin which engages in them and which disengage from one another in the end positions mentioned.
  • the anti-rotation device is therefore only effective in the area between the end positions mentioned, so that, for example, a random release of a locking rod in the coupling position with a tool clamping bolt and an axial displacement from the coupling position is not possible.
  • Another development of the invention provides that on both sides of the longitudinal groove of each locking rod, in which the associated securing pin engages, circumferential grooves are connected on opposite sides, into which the associated securing pin engages in the end positions and in these End positions allow rotation about the locking rod longitudinal axis according to the respective circumferential extent of the circumferential grooves.
  • Such a design of the clamping device ensures that when a locking rod is inserted into the coupling position with the transverse recess of a tool clamping bolt, the clamping eccentric is always in a position outside its clamping position and only after the locking rod has been fully inserted into its end position by rotating it Longitudinal axis can be brought into the clamping position with the transverse recess of the tool clamping bolt in question.
  • a particularly simple embodiment of the clamping device according to the invention is achieved when the longitudinal groove and the circumferential grooves, which together form a securing link, each extend in the bearing pin of the locking rods and the securing pins are received in bores of the quick-action clamping plates running transverse to the bearing bores and in the bearing bores protrude and engage in the mentioned grooves of the locking link of the respective locking rod.
  • the clamping device illustrated in the drawing is used for clamping tools with clamping bolts projecting over lateral clamping surfaces and having transverse recesses in the vicinity of their free ends.
  • such tools are injection molds which, when used as intended, are attached with their one mold half to a fixed mounting plate of an injection molding machine, but with the other mold half to a movable machine mounting plate.
  • the quick release plates 10, 10 'shown in Fig. 2 each have a central central recess 11 and on both sides of this two receiving bores 12, which extend transversely to the surface area of the quick release plates through them and in which, when used as intended, the lateral clamping plates of the tools to be clamped protruding clamping bolt 13 are added.
  • These clamping bolts are provided in the vicinity of their ends remote from the respective tool clamping surface with transverse recesses 14 in the form of U-shaped grooves which are open on one side.
  • four bearing bores 15 extend in the plane of the quick-action clamping plates, which cut the receiving bores for the tool clamping bolts off-center.
  • Locking rods 16 are mounted axially movable and rotatable in these bearing bores.
  • the locking rods 16 have a pin section 17 which is adapted to the bearing bores and which is delimited on one side by an annular collar 19 provided with knurling 18, to which a key attachment surface 20 adjoins.
  • the pin section 17 is followed by a clamping eccentric 21 and adjoins this a bearing pin 22 which runs coaxially to the pin section and whose diameter is reduced compared to the pin section.
  • the axial length of the bearing pins 17 of the locking rods is dimensioned such that when the locking rods are fully inserted into the bearing bores, if the respective securing pin 30 is in the region of the circumferential groove 24 which extends approximately over 180 °, the clamping eccentrics 21 in the receiving bores 12 for the tool -Tensioning bolts 13 are available to hold a tool by Ver rotation about the locking rod longitudinal axis with the transverse recesses 14, 14 'to be clamped.
  • the quick-release plates 10, 10 'shown in FIG. 1 are attached in a manner not of interest here, for example by means of screws 33 which engage in screw holes 34, mutually opposite mounting plates, for example an injection molding machine, in such a way that the central recesses 11 and the receiving bores are alike Align 12 of the two quick release plates. If an injection mold 35, or another tool equipped with appropriate clamping bolts, is now to be clamped, the locking rods 16 must be brought into their extended position limited by the securing link 28 and in this position by engagement of the securing pin 30 in the circumferential groove 26 adjacent to the respective clamping eccentric 21 be locked. You also have to the quick release plates 10, 10 'are at a distance from each other which is greater than the width of the injection mold to be clamped, including the laterally protruding clamping bolts.
  • an injection mold 35 with two mold halves 36, 36 'in the manner shown in FIG. 7 can be mounted so that these are inserted in the correct position between the mounting plates of an injection molding machine - not shown - injection molding machine 10, 10' and then initially the clamping bolts 13 of the one mold half are inserted into the receiving bores of one of the clamping plates, whereupon the locking rods 16 are axially inserted into the bearing bores 15 after being unlocked in their extended position due to rotation about their longitudinal axes.
  • the clamping eccentrics 21 engage in the transverse recesses 14 of the clamping bolts 13 then received in the receiving bores 12 and the bearing pins 22 adjoining the clamping eccentrics are received in correspondingly dimensioned sections of the bearing bores.
  • the locking pins 30 are in the region of the circumferential grooves 24 of the respective locking link 28, which extend over approximately 180 °, and the actual clamping is carried out by the locking rods being rotated in a corresponding manner about their longitudinal axes and as a result of the interaction of the clamping eccentrics 21 with corresponding clamping surfaces of the transverse recesses 14 of the clamping bolt 13 provides a form-fitting, fixed fixation of the mold half with the associated quick release plate.
  • the other half of the mold is then clamped in such a way that the mounting plate of the machine with the other quick release plate on the injection mold 35 located in the closed position or the latter on the attached to the other machine mounting plate Quick clamping plate is moved, the clamping bolts of said second mold half engaging in the receiving bores 12 of the second clamping plate.
  • the actual clamping then takes place in the same way as described above, in that the locking rods 16 are brought into their full insertion positions and are clamped by rotation about their longitudinal axes with their clamping eccentrics 21 with respect to the clamping surfaces of the transverse recesses of the clamping bolts 13.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Jigs For Machine Tools (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Devices For Molds (AREA)

Abstract

The clamping device comprises locking bars received rotatably and axially displaceably in bearing bores of a quick-action clamping plate, which intersect at right angles receiving bores for mould clamping bolts, which locking bars engage in the coupling position in transverse recesses of the mould clamping bolts and are braced with these by turning. To limit the axial mobility of the locking bars and to secure against rotations in the displacing region, positively interacting means are provided between the locking bars and the bearing bores receiving them. <IMAGE>

Description

Die Erfindung betrifft eine Spannvorrichtung für Werk­zeuge mit über seitliche Aufspannflächen vorstehenden und in der Nähe ihrer freien Enden Querausnehmungen aufweisenden Spannbolzen, mit einer Aufnahmebohrungen für die Werkzeug-Spannbolzen und diese Aufnahmeboh­rungen rechtwinklig schneidende Lagerbohrungen aufwei­senden Schnellspannplatte und mit in den Lagerbohrungen drehbar und axialverschiebbar aufgenommenen Verriege­lungsstangen mit in der Kupplungslage in die Queraus­nehmungen der Werkzeug-Spannbolzen eingreifenden und mit diesen durch Drehung verspannbaren Spannexzentern.The invention relates to a clamping device for tools with lateral clamping surfaces projecting and in the vicinity of their free ends transverse recesses having clamping bolts, with a receiving holes for the tool clamping bolts and these mounting bores having right-angled bearing bores quick release plate and with locking rods rotatably and axially displaceably received in the bearing bores with locking rods engaging in the coupling recesses in the transverse recesses of the tool clamping bolts and clamped with these clamping eccentrics.

Eine bekannte Spannvorrichtung dieser Art, die in der DE-OS 34 44 800 beschrieben ist, dient zum Spannen von Spritzgießformen mit zwei Formhälften, über deren seit­liche Aufspannflächen Spannbolzen vorstehen, die in der Nähe ihrer von den Aufspannflächen abgewandten Enden Quer­ausnehmungen in Gestalt einseitig offener U-förmiger Quernuten haben. Diese Spannvorrichtung umfaßt zwei bei bestimmungsgemäßer Verwendung an sich vertikal erstreckenden Aufnahmeplatten einer Spritzgießmaschine befestigte Schnellspannplatten mit rechtwinklig zu deren Flächenerstreckungen verlaufenden Aufnahmebohrungen für die Spannbolzen der Formhälften und mit in Lager­bohrungen, die sich jeweils in der Ebene der Schnell­spannplatten erstrecken und die Aufnahmebohrungen für die Werkzeug- Spannbolzen außermittig schneiden, axial­beweglich und drehbar aufgenommene Verriegelungsstangen.A known clamping device of this type, which is described in DE-OS 34 44 800, is used for clamping injection molds with two mold halves, over whose lateral clamping surfaces protrude clamping bolts which have transverse recesses in the form of a U open on one side near their ends facing away from the clamping surfaces -shaped Have transverse grooves. This tensioning device comprises two quick-action clamping plates fastened to the vertically extending mounting plates of an injection molding machine when used as intended, with mounting holes for the clamping bolts of the mold halves extending at right angles to their surface extensions and with bearing bores which each extend in the plane of the quick-action clamping plates and the mounting holes for the tool clamping bolts Cut off-center, axially movable and rotatable locking rods.

Die vorbekannte Spannvorrichtung hat sich zwar bewährt, erscheint aber in Bezug auf ihre Handhabung noch ver­besserungsbedürftig.The known tensioning device has proven itself, but appears to be in need of improvement in terms of its handling.

Ausgehend von der Spannvorrichtung nach dem Oberbegriff des Schutzanspruchs 1 ist die erfindungsgemäße Ver­besserung dadurch gekennzeichnet, daß zwischen den Verriegelungsstangen und der diese jeweils in Lager­bohrungen aufnehmenden Schnellspannplatte formschlüssig zusammenwirkende Mittel zur Begrenzung der Axialbe­weglichkeit der Verriegelungsstangen zwischen zwei axialen Endlagen und zur Sicherung gegen Drehung im Verschiebebereich zwischen diesen Endlagen vorgesehen sind.Starting from the tensioning device according to the preamble of protection claim 1, the improvement according to the invention is characterized in that between the locking rods and the quick-action clamping plate each accommodating them in bearing bores, form-fittingly interacting means for limiting the axial mobility of the locking rods between two axial end positions and for securing against rotation in the displacement range between these end positions are provided.

Während bei der vorbekannten Spannvorrichtung die Verrie­gelungsstangen nach Gefühl aus der die Kupplungslage mit den Werkzeug-Spannbolzen kennzeichnenden Endlage in eine Entriegelungslage herausgezogen werden mußten, in der die Spannexzenter nicht mehr in die Queraus­ nehmungen der entsprechenden Werkzeug-Spannbolzen ein­greifen und diese somit freigeben, handelt es sich bei der Erfindung darum, daß die der Kupplungslagen mit einem Werkzeug-Spannbolzen entsprechende eine Endlage und die demgegenüber zurückgezogene andere Endlage durch die erwähnten Sicherungsmittel fixiert sind und im Ver­schiebebereich zwischen diesen Endlagen eine Drehung der Verriegelungsstangen unterbunden ist. Es liegt so­mit eine eindeutige Fixation der beiden Endlagen der Verriegelungsstangen sowie im Bereich dazwischen eine Verdrehsicherung vor.While in the known clamping device, the locking rods had to be pulled out of the end position which identified the coupling position with the tool clamping bolts into an unlocking position, in which the clamping eccentric no longer moved into the transverse direction Take the corresponding tool clamping pin interventions and thus release it, the invention is that the one corresponding to the coupling positions with a tool clamping pin one end position and the other end position withdrawn are fixed by the mentioned securing means and in the displacement range between these end positions rotation of the locking rods is prevented. There is therefore a clear fixation of the two end positions of the locking rods and an anti-rotation device in the area in between.

Gemäß einer Weiterbildung der Erfindung umfassen die Mittel zur Begrenzung der axialen Verschiebbarkeit der Verriegelungsstangen zwischen den beiden genannten Endlagen und zur Verdrehsicherung im Verschiebebereich zwischen diesen Endlagen eine Längsnut und einen in diese eingreifenden Sicherungszapfen, die in den erwähn­ten Endlagen außer Eingriff miteinander gelangen. Die Verdrehsicherung ist somit nur im Bereich zwischen den erwähnten Endlagen wirksam, so daß beispielsweise ein zufälliges Lösen einer Verriegelungsstange in der Kupp­lungslage mit einem Werkzeug-Spannbolzen und eine Axial­verschiebung aus der Kupplungslage nicht möglich ist.According to a development of the invention, the means for limiting the axial displaceability of the locking rods between the two end positions mentioned and for securing against rotation in the displacement area between these end positions comprise a longitudinal groove and a locking pin which engages in them and which disengage from one another in the end positions mentioned. The anti-rotation device is therefore only effective in the area between the end positions mentioned, so that, for example, a random release of a locking rod in the coupling position with a tool clamping bolt and an axial displacement from the coupling position is not possible.

Eine andere Weiterbildung der Erfindung sieht vor, daß sich beidseitig an die Längsnut jeder Verriegelungs­stange, in die der zugeordnete Sicherungszapfen ein­greift, nach voneinander abgewandten Seiten Umfangs­nuten anschließen, in die in den Endlagen der jeweils zugeordnete Sicherungszapfen eingreift und in diesen Endlagen eine Drehung um die Verriegelungsstangen-Längs­achse entsprechend der jeweiligen Umfangserstreckung der Umfangsnuten ermöglicht.Another development of the invention provides that on both sides of the longitudinal groove of each locking rod, in which the associated securing pin engages, circumferential grooves are connected on opposite sides, into which the associated securing pin engages in the end positions and in these End positions allow rotation about the locking rod longitudinal axis according to the respective circumferential extent of the circumferential grooves.

Durch eine derartige Ausbildung der Spannvorrichtung ist sichergestellt, daß beim Einschieben einer Verriegelungs­stange in die Kupplungslage mit der Querausnehmung eines Werkzeug-Spannbolzens der Spannexzenter immer in einer Stellung außerhalb seiner Spannlage steht und erst nach vollständigem Einschieben in der betreffenden Endlage der Verriegelungsstange durch deren Drehung um ihre Längsachse in Spannlage mit der Querausnehmung des betreffenden Werkzeug-Spannbolzens bringbar ist.Such a design of the clamping device ensures that when a locking rod is inserted into the coupling position with the transverse recess of a tool clamping bolt, the clamping eccentric is always in a position outside its clamping position and only after the locking rod has been fully inserted into its end position by rotating it Longitudinal axis can be brought into the clamping position with the transverse recess of the tool clamping bolt in question.

Eine besonders einfache Ausbildung der erfindungsgemäßen Spannvorrichtung wird dann erreicht, wenn die Längsnut und die Umfangsnuten, die gemeinsam eine Sicherungs­kulisse bilden, sich jeweils in den Lagerzapfen der Ver­riegelungsstangen erstrecken und die Sicherungszapfen in quer zu den Lagerbohrungen verlaufenden Bohrungen der Schnellspannplatten aufgenommen sind sowie in die Lagerbohrungen hineinragen und dabei in die erwähnten Nuten der Sicherungskulisse der jeweiligen Verriegelungs­stange eingreift.A particularly simple embodiment of the clamping device according to the invention is achieved when the longitudinal groove and the circumferential grooves, which together form a securing link, each extend in the bearing pin of the locking rods and the securing pins are received in bores of the quick-action clamping plates running transverse to the bearing bores and in the bearing bores protrude and engage in the mentioned grooves of the locking link of the respective locking rod.

Anhand der beigefügten Zeichnung soll eine Ausführungs­form der erfindungsgemäßen Spannvorrichtung erläutert werden. In schematischen Ansichten zeigen:

  • Fig. 1 zwei im Abstand voneinander stehende Schnell­spannplatten mit je einer aus einer Lagerbohrung herausgezogenen Verriegelungsstange und mit zwei gesondert dargestellten Spannbolzen eines im übrigen nicht gezeigten Werkzeugs in einer perspektivischen Darstellung,
  • Fig. 2 eine Verriegelungsstange für sich allein in einer gegenüber Fig. 1 vergrößterten Perspek­tivansicht,
  • Fig. 3 eine stirnseitige Ansicht der Verriegelungs­stange mit Blick gemäß Pfeil III in Fig. 2 auf einen stirnendigen Lagerzapfen und einen Spannexzenter,
  • Fig. 4 einen Querschnitt durch die Verriegelungsstange im Bereich einer sich über einen Umfangswinkel von etwa 180° erstreckenden Quernut,
  • Fig. 5 in einer Ansicht ähnlich Fig. 4 einen Quer­schnitt durch die Verriegelungsstange im Bereich einer sich über etwa 90° Umfangswinkel erstrecken­den Quernut
  • Fig. 6 in einem rechtwinklig zu einer Lagerbohrung mit einer darin aufgenommenen Verriegelungs­stange verlaufenden ausschnittsweisen Quer­schnitt durch eine Schnellspannplatte und
  • Fig. 7 eine zwischen zwei Schnellspannplatten, die bei bestimmungsgemäßer Verwendung ihrerseits an den Aufnahmeplatten einer - nicht gezeigten - Spritzgießmaschine fest montiert sind, aufge­nommene Spritzgießform in einer perspektivischen Ansicht.
An embodiment of the tensioning device according to the invention will be explained with reference to the accompanying drawing. Schematic views show:
  • Fig. 1 two spaced quick release plates, each with a bearing bore pulled out locking rod and with two separately shown clamping bolts of a tool not shown in a perspective view,
  • 2 is a locking bar by itself in an enlarged perspective view compared to FIG. 1,
  • 3 shows an end view of the locking rod with a view according to arrow III in FIG. 2 onto an end bearing journal and a clamping eccentric,
  • 4 shows a cross section through the locking rod in the region of a transverse groove extending over a circumferential angle of approximately 180 °,
  • Fig. 5 in a view similar to Fig. 4 shows a cross section through the locking rod in the region of a transverse groove extending over approximately 90 ° circumferential angle
  • Fig. 6 in a cross-section at right angles to a bearing bore with a locking rod received therein through a quick release plate and
  • 7 is a perspective view of an injection mold taken between two quick-action clamping plates which, when used as intended, are in turn permanently mounted on the mounting plates of an injection molding machine (not shown).

Die in der Zeichnung veranschaulichte Spannvorrichtung dient zum Spannen von Werkzeugen mit über seitliche Aufspannflächen vorstehenden und in der Nähe ihrer freien Enden Querausnehmungen aufweisenden Spannbolzen. In aller Regel handelt es sich bei derartigen Werkzeugen um Spritzgießformen, die bei bestimmungsgemäßer Verwen­dung mit ihrer einen Formhälfte an einer feststehenden Aufnahmeplatte einer Spritzgießmaschine, hingegen mit der anderen Formhälfte an einer bewegbaren Maschinen-­Aufnahmeplatte befestigt sind.The clamping device illustrated in the drawing is used for clamping tools with clamping bolts projecting over lateral clamping surfaces and having transverse recesses in the vicinity of their free ends. As a rule, such tools are injection molds which, when used as intended, are attached with their one mold half to a fixed mounting plate of an injection molding machine, but with the other mold half to a movable machine mounting plate.

Die in Fig. 2 gezeigten Schnellspannplatten 10, 10′ haben je eine zentrische Mittelausnehmung 11 und beid­seitig von dieser jeweils zwei Aufnahmebohrungen 12, die sich quer zur Flächenausdehnung der Schnellspann­platten durch diese hindurcherstrecken und in denen bei bestimmungsgemäßer Verwendung die über seitliche Aufspannplatten der zu spannenden Werkzeuge vorstehen­den Spannbolzen 13 aufgenommen sind. Diese Spannbolzen sind in der Nähe ihrer von der jeweiligen Werkzeug-­Spannfläche entfernten Enden mit Querausnehmungen 14 in Form einseitig offener U-förmiger Nuten versehen. Ferner erstrecken sich in der Ebene der Schnellspann­platten vier Lagerbohrungen 15, welche die Aufnahme­bohrungen für die Werkzeug-Spannbolzen außermittig schneiden. In diesen Lagerbohrungen sind Verriegelungs­stangen 16 axialbeweglich und drehbar gelagert.The quick release plates 10, 10 'shown in Fig. 2 each have a central central recess 11 and on both sides of this two receiving bores 12, which extend transversely to the surface area of the quick release plates through them and in which, when used as intended, the lateral clamping plates of the tools to be clamped protruding clamping bolt 13 are added. These clamping bolts are provided in the vicinity of their ends remote from the respective tool clamping surface with transverse recesses 14 in the form of U-shaped grooves which are open on one side. Furthermore, four bearing bores 15 extend in the plane of the quick-action clamping plates, which cut the receiving bores for the tool clamping bolts off-center. Locking rods 16 are mounted axially movable and rotatable in these bearing bores.

Die Verriegelungsstangen 16 haben einen den Lagerbohrungen angepaßten Zapfenabschnitt 17, der auf einer Seite von einem mit einer Rändelung 18 versehenen Ringbund 19 begrenzt ist, an den sich eine Schlüsselansatzfläche 20 anschließt.The locking rods 16 have a pin section 17 which is adapted to the bearing bores and which is delimited on one side by an annular collar 19 provided with knurling 18, to which a key attachment surface 20 adjoins.

Auf der anderen Seite folgt auf den Zapfenabschnitt 17 ein Spannexzenter 21 und an diesen schließt sich ein koaxial zum Zapfenabschnitt verlaufender Lagerzapfen 22 an, dessen Durchmesser gegenüber dem Zapfenabschnitt reduziert ist.On the other hand, the pin section 17 is followed by a clamping eccentric 21 and adjoins this a bearing pin 22 which runs coaxially to the pin section and whose diameter is reduced compared to the pin section.

In dem den Lagerbohrungen in den Schnellspannplatten 10, 10′ angepaßten Zapfenabschnitt 17 der Verriegelungsstangen erstreckt sich in der Nähe des Ringbundes 19 eine Umfangs­nut 24 über einen Umfangswinkel von etwa 180°, an die sich eine axialgerichtete Längsnut 25 anschließt, die auf der zum Spannexzenter 22 hinweisenden Seite in eine weitere Umfangsnut 26 mit einer Umfangserstreckung von etwa 90° übergeht. Die beiden Umfangsnuten 24, 26 und die Längs­nut 25 im Zapfenabschnitt 17 bilden eine Sicherungs­kulisse 28. Bei in den Lagerbohrungen der Schnellspann­platten aufgenommenen Verriegelungsstangen 16 greift je­weils als Sicherungszapfen 30 der Endabschnitt einer Sicherungsschraube 31, die in senkrecht zur Flächener­streckung der Schnellspannplatten angeordneten Gewinde­bohrungen 32 aufgenommen sind, in die Sicherungskulisse 28 ein. Angesichts des Eingriffs eines Sicherungszapfens in die Sicherungskulisse jeder Verriegelungsstange sind deren Axialbewegbarkeit und in den jeweiligen Endlagen die Drehbarkeit begrenzt.In the bearing holes in the quick release plates 10, 10 'adapted pin section 17 of the locking rods extends in the vicinity of the collar 19 a circumferential groove 24 over a circumferential angle of about 180 °, to which an axially directed longitudinal groove 25 connects, which on the 22 to the clamping eccentric indicative side merges into a further circumferential groove 26 with a circumferential extent of approximately 90 °. The two circumferential grooves 24, 26 and the longitudinal groove 25 in the pin section 17 form a securing link 28. When locking rods 16 are received in the bearing bores of the quick-action clamping plates, the end section of a securing screw 31, which is received in threaded holes 32 arranged perpendicular to the surface extension of the quick-action clamping plates, acts as the securing pin 30 , in the security link 28. In view of the engagement of a locking pin in the locking link of each locking rod, its axial movability and the rotation in the respective end positions are limited.

Die axiale Länge der Lagerzapfen 17 der Verriegelungs­stangen ist so bemessen, daß bei voll in die Lagerboh­rungen eingeschobenen Verriegelungsstangen, wenn der je­weilige Sicherungszapfen 30 im Bereich der sich etwa über 180° erstreckenden Umfangsnut 24 steht, die Spannexzenter 21 in den Aufnahmebohrungen 12, für die Werkzeug-Spannbolzen 13 stehen, um bei der Halterung eines Werkzeugs durch Ver­ drehung um die Verriegelungsstangen-Längsachse mit den Querausnehmungen 14, 14′ der Spannbolzen verspannt zu werden. In der Ausziehstellung der Verriegelungs­bolzen, die durch die dem Spannexzenter 21 benachbarte, sich über etwa 90° Umfangswinkel erstreckende Umfangs­nut 26 begrenzt ist, sind hingegen die Spannexzenter 21 mit den sich von diesen forterstreckenden Lagerzapfen 22 aus dem Bereich der Lagerbohrungen in den Schnellspann­platten zurückgezogen. Durch Drehung der Verriegelungs­stangen in der Ausziehlage werden diese angesichts des Eingriffs des Sicherungszapfens 30 in die sich über etwa 90° erstreckende Umfangsnut 26 arretiert und ein Einschieben gelingt erst nach einer Verdrehung der Verriegelungsstangen um ihre Längsachsen dergestalt, daß die Sicherungszapfen 30 im Bereich der sich axial erstreckenden Längsnuten 25 stehen.The axial length of the bearing pins 17 of the locking rods is dimensioned such that when the locking rods are fully inserted into the bearing bores, if the respective securing pin 30 is in the region of the circumferential groove 24 which extends approximately over 180 °, the clamping eccentrics 21 in the receiving bores 12 for the tool -Tensioning bolts 13 are available to hold a tool by Ver rotation about the locking rod longitudinal axis with the transverse recesses 14, 14 'to be clamped. In the extended position of the locking bolt, which is delimited by the circumferential groove 26 adjacent to the clamping eccentric 21 and extending over approximately 90 ° circumferential angle, the clamping eccentrics 21 with the bearing pins 22 extending therefrom are withdrawn from the area of the bearing bores in the quick-action clamping plates. By rotating the locking rods in the extended position, these are locked in view of the engagement of the locking pin 30 in the circumferential groove 26, which extends over approximately 90 °, and insertion is only possible after the locking rods have been rotated about their longitudinal axes in such a way that the locking pin 30 is in the region of the axially extending longitudinal grooves 25 are.

Bei bestimmungsgemäßer Verwendung sind die aus Fig. 1 ersichtlichen Schnellspannplatten 10, 10′ in im einzelnen hier nicht interessierender Weise beispielsweise mittels Schrauben 33, die in Schraubenlöcher 34 eingreifen, aneinander gegenüberliegenden Aufnahmeplatten etwa einer Spritzgießmaschine so befestigt, daß gleichermaßen die Mittelausnehmungen 11 und die Aufnahmebohrungen 12 der beiden Schnellspannplatten miteinander fluchten. Wenn nun eine Spritzgießform 35, oder ein anderes mit entspre­chenden Spannbolzen ausgerüstetes Werkzeug, gespannt werden soll, müssen die Verriegelungsstangen 16 in ihre durch die Sicherungskulisse 28 begrenzte Ausziehlage ge­bracht und in dieser Position durch Eingriff der Siche­rungszapfen 30 in die dem jeweiligen Spannexzenter 21 benachbarte Umfangsnut 26 arretiert werden. Außerdem müssen die Schnellspannplatten 10, 10′ in einem Abstand von­einander stehen, der größer ist als die Breitenerstrek­kung der zu spannenden Spritzgießform, einschließlich der seitlich vorstehenden Spannbolzen.When used as intended, the quick-release plates 10, 10 'shown in FIG. 1 are attached in a manner not of interest here, for example by means of screws 33 which engage in screw holes 34, mutually opposite mounting plates, for example an injection molding machine, in such a way that the central recesses 11 and the receiving bores are alike Align 12 of the two quick release plates. If an injection mold 35, or another tool equipped with appropriate clamping bolts, is now to be clamped, the locking rods 16 must be brought into their extended position limited by the securing link 28 and in this position by engagement of the securing pin 30 in the circumferential groove 26 adjacent to the respective clamping eccentric 21 be locked. You also have to the quick release plates 10, 10 'are at a distance from each other which is greater than the width of the injection mold to be clamped, including the laterally protruding clamping bolts.

Nach diesen Montagevorbereitungen kann eine Spritzgieß­form 35 mit zwei Formhälften 36, 36′ in der aus Fig. 7 ersichtlichen Weise so montiert werden, daß diese zwi­schen die an den Aufnahmeplatten einer - nicht gezeigten - Spritzgießmaschine befestigten Schnellspannplatten 10, 10′ lagerichtig eingeführt und dann zunächst die Spannbolzen 13 der einen Formhälfte in die Aufnahmebohrungen einer der Spannplatten eingeführt werden, worauf die Verriegelungs­stangen 16 nach Entriegelung in ihrer Ausziehlage infolge Drehung um ihre Längsachsen axial in die Lagerbohrungen 15 eingeschoben werden. Dabei greifen die Spannexzenter 21 in die Querausnehmungen 14 der in den Aufnahmebohrungen 12 dann aufgenommenen Spannbolzen 13 ein und die an die Spann­exzenter angrenzenden Lagerzapfen 22 werden in entsprechend bemessenen Abschnitten der Lagerbohrungen aufgenommen. In der Einschublage stehen die Sicherungszapfen 30 im Bereich der sich über etwa 180° erstreckenden Umfangs­nuten 24 der jeweiligen Sicherungskulisse 28 und das eigent­liche Spannen erfolgt, indem die Verriegelungsstangen in entsprechender Weise um ihre Längsachsen gedreht und infolge des Zusammenwirkens der Spannexzenter 21 mit entsprechen­den Spannflächen der Querausnehmungen 14 der Spannbolzen 13 eine formschlüssig feste Fixation der Formhälfte mit der zugeordneten Schnellspannplatte vermittelt.After these assembly preparations, an injection mold 35 with two mold halves 36, 36 'in the manner shown in FIG. 7 can be mounted so that these are inserted in the correct position between the mounting plates of an injection molding machine - not shown - injection molding machine 10, 10' and then initially the clamping bolts 13 of the one mold half are inserted into the receiving bores of one of the clamping plates, whereupon the locking rods 16 are axially inserted into the bearing bores 15 after being unlocked in their extended position due to rotation about their longitudinal axes. The clamping eccentrics 21 engage in the transverse recesses 14 of the clamping bolts 13 then received in the receiving bores 12 and the bearing pins 22 adjoining the clamping eccentrics are received in correspondingly dimensioned sections of the bearing bores. In the inserted position, the locking pins 30 are in the region of the circumferential grooves 24 of the respective locking link 28, which extend over approximately 180 °, and the actual clamping is carried out by the locking rods being rotated in a corresponding manner about their longitudinal axes and as a result of the interaction of the clamping eccentrics 21 with corresponding clamping surfaces of the transverse recesses 14 of the clamping bolt 13 provides a form-fitting, fixed fixation of the mold half with the associated quick release plate.

Die andere Formhälfte, die bei geschlossener Spritzgießform mit der bereits gespannten Formhälfte durch geeignete Mittel in Schließlage gehalten ist, wird im Anschluß daran in der Weise gespannt, daß die Aufnahmeplatte der Maschine mit der anderen Schnellspannplatte auf die in Schließstellung befindliche Spritzgießform 35 bzw. letztere auf die an der anderen Maschinen-Aufnahme­platte befestigte Schnellspannplatte zubewegt wird, wobei die Spannbolzen der genannten zweiten Formhälfte in die Aufnahmebohrungen 12 der zweiten Spannplatte eingreifen. Das eigentliche Spannen erfolgt dann in gleicher Weise wie oben beschrieben, indem die Ver­riegelungsstangen 16 in ihre vollen Einschublagen ge­bracht und durch Drehung um ihre Längsachsen mit ihren Spannexzentern 21 gegenüber den Spannflächen der Quer­ausnehmungen der Spannbolzen 13 verspannt werden.The other half of the mold, the one with the injection mold closed with the already clamped mold half held in the closed position by suitable means, is then clamped in such a way that the mounting plate of the machine with the other quick release plate on the injection mold 35 located in the closed position or the latter on the attached to the other machine mounting plate Quick clamping plate is moved, the clamping bolts of said second mold half engaging in the receiving bores 12 of the second clamping plate. The actual clamping then takes place in the same way as described above, in that the locking rods 16 are brought into their full insertion positions and are clamped by rotation about their longitudinal axes with their clamping eccentrics 21 with respect to the clamping surfaces of the transverse recesses of the clamping bolts 13.

Claims (4)

1. Spannvorrichtung für Werkzeuge mit über seitliche Auf­spannflächen vorstehenden und in der Nähe ihrer freien Enden Querausnehmungen aufweisenden Spannbolzen, mit einer Aufnahmebohrungen für die Werkzeug-Spannbolzen und diese Aufnahmebohrungen rechtwinklig schneidende Lager­bohrungen aufweisenden Schnellspannplatte und mit in den Lagerbohrungen drehbar und axial verschiebbar aufge­nommenen Verriegelungsstangen mit in der Kupplungslage in die Querausnehmungen der Werkzeug-Spannbolzen eingrei­fenden und mit diesen durch Drehung verspannbaren Spann­exzentern,
gekennzeichnet durch zwischen den Verriegelungsstangen (16) und der diese jeweils in den Lagerbohrungen (15) aufnehmen­den Schnellspannplatte (10) formschlüssig zusammenwir­kende Mittel (28, 30) zur Begrenzung der Axialbeweglich­keit der Verriegelungsstangen zwischen zwei axialen End­lagen und zur Sicherung gegen Drehungen im Verschiebe­bereich zwischen diesen Endlagen.1.Clamping device for tools with clamping bolts protruding over lateral clamping surfaces and having transverse recesses in the vicinity of their free ends, with a receiving bore for the tool clamping bolt and these mounting bores with quick-action clamping plate which have bearing bores which cut at right angles, and with locking rods which are rotatable and axially displaceable in the bearing bores and with in the coupling position engages in the transverse recesses of the tool clamping bolts and can be clamped with these by means of clamping eccentrics,
characterized by means (28, 30) between the locking rods (16) and the quick-action clamping plate (10) receiving these in the bearing bores (15) in a form-fitting manner to limit the axial mobility of the locking rods between two axial end positions and to prevent rotation in the displacement area between them End positions. 2. Spannvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel zur Begrenzung der axialen Verschiebbarkeit der Verriegelungsstangen (16) zwischen den beiden axialen Endlagen und zur Verdrehsicherung im Verschiebebereich zwi­schen diesen Endlagen eine Längsnut (25) und einen in diese eingreifenden Sicherungszapfen (30) umfassen, die in den Endlagen außer Eingriff miteinander gelangen.2. Clamping device according to claim 1, characterized in that the means for limiting the axial displaceability of the locking rods (16) between the two axial end positions and for securing against rotation in the displacement area between these end positions, a longitudinal groove (25) and a locking pin (30) engaging in these include, which come out of engagement with each other in the end positions. 3. Spannvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß sich beidendig an die Längsnut (25) nach voneinander ab­gewandten Seiten Umfangsnuten (24, 26) anschließen, in die in den Endlagen der jeweils zugeordnete Sicherungszapfen (30) eingreift und in diesen Endlagen eine Drehung um die Verriegelungsstangen-Längsachse entsprechend der jeweiligen Umfangserstreckung der Umfangsnuten ermöglicht.3. Clamping device according to claim 2, characterized in that circumferential grooves (24, 26) adjoin both ends of the longitudinal groove (25) on opposite sides, into which the respective associated securing pin (30) engages in the end positions and a rotation in these end positions around the locking rod longitudinal axis according to the respective circumferential extent of the circumferential grooves. 4. Spannvorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Längsnut (25) und die Umfangsnuten (24, 26) sich jeweils in den Lagerzapfen (17) der Verriegelungsstangen (16) erstrecken und daß die Sicherungszapfen in quer zu den Lagerbohrungen verlaufenden Bohrungen (32) der Schnell­spannplatten (10) aufgenommen sind und in die Lagerboh­rungen (15) hineinragen sowie in die erwähnten Längs- und Umfangsnuten eingreifen.4. Clamping device according to claim 3, characterized in that the longitudinal groove (25) and the circumferential grooves (24, 26) each extend in the bearing pin (17) of the locking rods (16) and in that the securing pin in bores extending transversely to the bearing bores ( 32) of the quick release plates (10) are received and protrude into the bearing bores (15) and engage in the longitudinal and circumferential grooves mentioned.
EP89119561A 1988-11-08 1989-10-21 Clamping device for moulds with clamping bolts protruding from lateral clamping surfaces Expired - Lifetime EP0368064B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89119561T ATE86914T1 (en) 1988-11-08 1989-10-21 CLAMPING DEVICE FOR TOOLS WITH CLAMPING PINS PROJECTING OVER THE LATERAL CLAMPING SURFACE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8813924U DE8813924U1 (en) 1988-11-08 1988-11-08 Clamping device for tools with clamping bolts protruding over lateral clamping surfaces
DE8813924U 1988-11-08

Publications (3)

Publication Number Publication Date
EP0368064A2 true EP0368064A2 (en) 1990-05-16
EP0368064A3 EP0368064A3 (en) 1991-05-15
EP0368064B1 EP0368064B1 (en) 1993-03-17

Family

ID=6829625

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89119561A Expired - Lifetime EP0368064B1 (en) 1988-11-08 1989-10-21 Clamping device for moulds with clamping bolts protruding from lateral clamping surfaces

Country Status (4)

Country Link
EP (1) EP0368064B1 (en)
AT (1) ATE86914T1 (en)
DE (2) DE8813924U1 (en)
ES (1) ES2039057T3 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468406A (en) * 1946-05-03 1949-04-26 Mora Jose Lock
GB796955A (en) * 1955-02-21 1958-06-25 Rely A Bell Burglar And Fire A Mechanical lock
GB903728A (en) * 1958-09-17 1962-08-15 Smith & Davis Ltd Improvements relating to sliding bolt fastenings for doors and the like
GB1379613A (en) * 1972-01-01 1975-01-02 Davenport A Locks
GB2108622A (en) * 1981-11-06 1983-05-18 Josef Orlik Tool mountings
DE3426157A1 (en) * 1984-07-16 1986-01-23 geb. Sterl Andrea 8501 Wendelstein Pemsel Connecting member for releasably connecting two profile sections
EP0184744A2 (en) * 1984-12-08 1986-06-18 Alois Wörner Tool, in particular an injection-moulding die

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468406A (en) * 1946-05-03 1949-04-26 Mora Jose Lock
GB796955A (en) * 1955-02-21 1958-06-25 Rely A Bell Burglar And Fire A Mechanical lock
GB903728A (en) * 1958-09-17 1962-08-15 Smith & Davis Ltd Improvements relating to sliding bolt fastenings for doors and the like
GB1379613A (en) * 1972-01-01 1975-01-02 Davenport A Locks
GB2108622A (en) * 1981-11-06 1983-05-18 Josef Orlik Tool mountings
DE3426157A1 (en) * 1984-07-16 1986-01-23 geb. Sterl Andrea 8501 Wendelstein Pemsel Connecting member for releasably connecting two profile sections
EP0184744A2 (en) * 1984-12-08 1986-06-18 Alois Wörner Tool, in particular an injection-moulding die

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KUNSTSTOFFE, Band 74, Nr. 11, November 1984, Seite 671, M}nchen, DE; "Verk}rzung von Werkzeug-Wechselzeiten" *

Also Published As

Publication number Publication date
ATE86914T1 (en) 1993-04-15
ES2039057T3 (en) 1993-08-16
DE58903806D1 (en) 1993-04-22
EP0368064A3 (en) 1991-05-15
DE8813924U1 (en) 1989-02-16
EP0368064B1 (en) 1993-03-17

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